Get the Best Generac Generator Installation & Maintenance in New Jersey

Protect Your Home 24/7 with a New Generac Generator

Say Goodbye to Power Outages With a Generac Generator

Serving New Jersey since 2010, Green Sun Energy Services specializes in Generac home backup generators. With thousands of satisfied customers, we offer expert installation, flexible payments, and top warranties—making backup power simple and worry-free! For homeowners comparing options, our comprehensive Generac Buyer’s Guide walks you through sizing, fuel choices, and key features so you can make a confident, informed decision.

Locally owned and operated

Our local team professionally installs and services Generac generators in Monmouth, Ocean, Middlesex, Somerset, Mercer, and Union counties.

Focused on long-term relationships

Dedicated to building lasting customer relationships through trust, reliability, and long-term support.

Flexible payment solutions

Dozens of payment options to make home backup solutions accessible and affordable for nearly every homeowner.

Industry-leading products, workmanship, and warranty

We install industry-leading Generac systems backed by a 5-year workmanship warranty and 5-star service. Our team follows best practices outlined in our Buyer’s Guide to ensure every system is properly sized, installed, and optimized for long-term performance.

Get Your Hassle-Free Generator Estimate

Your Name(Required)

First Last

Customer Reviews for Solar, Roofing, EV Chargers, Generators, Soft Washing & Holiday Lighting

GusFarmingdale, NJ · 2026
Reviewed us onGoogle
Excellent service, follow-up, and an outstanding experience throughout the entire process! We were extremely happy with Green Sun…
Read more
…Energy Services from the first day through the final Township approvals. They even coordinated with the gas company to install a larger gas meter for our new generator. A special thank-you to Jennifer for her consistent follow-up and help getting everything completed. We highly recommend the team! Gus & Joan Vergara
See the project
Holmdel, NJ · 2026
Reviewed us onGoogle
John and Auston were a stellar team, their attention to detail was amazing. Thank you!
See the project
JeannieMorganville, NJ · 2026
Reviewed us onGoogle
We purchased a generator last October and it was installed by Green Sun Energy Services. There were a few delays beyond their…
Read more
…control (snow, town permits, technical problem with the actual generator), but I was so pleased with the professionalism of everyone I dealt with Glen, Karen, Jennifer, Chris and all the technicians who worked to install our generator. Early this morning I experienced our first extended loss of power due to a large tree falling in the area. After a few seconds in the dark and some supernatural sounds, our generator powered right up. Nine hours later power is still out but our generator is going strong. Definitely one of the best purchases we've made!
See the project
BarryLambertville, NJ · 2026
Reviewed us onGoogle
Austin visited for the yearly maintenance on our generator. He was courteous, pleasant, and professional. He explained everything…
Read more
…he did in detail. I appreciate that Green Sun keeps track of the maintenance schedule so I don't have to. Great service.
See the project
ThomasMiddletown, NJ · 2026
Reviewed us onGoogle
Mike serviced and installed a new battery for my generator.He did a great job and was very helpful with all my questions.Thank You.
See the project
Ronald and RobinFair Haven, NJ · 2026
Reviewed us onBBB
As an engineer, I appreciate and recognize what it takes to plan and execute an excellent job, and thats what Green Sun Energy…
Read more
…did for us with the installation, and now ongoing maintenance, of our stand-by generator.
See the project
AnnamariaRed Bank, NJ · 2026
Reviewed us onYelp
Our annual service was done yesterday by John he was amazing and has been serving our generator for a few years now, the whole team is amazing!
See the project
Steve and LisaScotch Plains, NJ · 2026
Reviewed us onYelp
Mike was great! Thorough and professional!! Took the time to explain what he did/replaced.
See the project
MarcinParlin, NJ · 2026
Reviewed us onGoogle
Great generator service and troubleshooting by Auston. Highly recommend the company.
See the project

Get the Unbeatable Protection of a Generac Generator!

When the power goes out, your Generac standby generator turns on automatically—usually within seconds—so your home stays safe and comfortable. That means your heat or A/C, refrigerator, sump pump, Wi-Fi, lights, and essential systems can keep running without you doing anything.

Unlike portable generators, a standby generator is permanently installed, starts and stops on its own, and runs on your home’s natural gas or propane—so there’s no refueling, no extension cords, and no scrambling during a storm.

Choose the Right Level of Backup Power

Generac standby generators range from 10–28kW, supporting homes from about 1,000 sq. ft. to 6,000+ sq. ft. depending on what you want to power. We’ll review your needs and design the right solution for your home and budget:

- Essential Power Coverage – Keeps the most important circuits running (like heat, fridge, sump pump, and some lights).
- Whole-Home Backup – Powers most or all of your home for the most seamless “business as usual” experience.
- Managed Whole-Home Backup – A flexible middle-ground that uses Generac load management to deliver near whole-home coverage with a smaller generator—balancing comfort, performance, and cost.

We Handle Everything

We manage the entire process for you, making generator installation simple and stress-free.

- Financing options available (if needed) — terms from 12 months up to 12 years.
- Right-size your generator based on your home and priorities.
- Determine the best generator location for safety, performance, code compliance, and ease of service.
- Handle permits and utility/gas coordination.
- Professional installation of the generator, transfer switch, and all connections.
- Full testing and inspection support so it’s ready for real outages.
- Ongoing service and maintenance, with optional remote monitoring and annual tune-ups using genuine Generac parts.

Why Choose a Generac Standby Generator

Automatic operation – Your generator senses an outage and turns on automatically—then shuts off when utility power returns. You’re protected whether you’re home, at work, or away on vacation.
No refueling – It runs on your home’s existing natural gas or propane supply, so you’re not dealing with gas cans, refills, or long lines during storm season.
Safe, direct power – A professionally installed transfer switch feeds power straight into your electrical panel, eliminating extension cords and reducing the risk of unsafe backfeeding.
Strong warranty options – Choose 5-, 7-, or 10-year coverage options for added confidence, with support available if your generator needs service.
Added home value – Standby power is a major selling point for buyers who want reliability, comfort, and protection for essential systems during outages.

Generac Generator Orientation

Generac Standby Generators for Reliable Home Backup Power

Generac next generation whole-home standby generator for a residential property.

Generac air-cooled standby generators are among the most advanced and reliable systems in their class, engineered to deliver dependable, fully automatic backup power when the electrical grid goes down. Designed to monitor utility power 24/7, these generators start on their own within seconds of an outage, restoring electricity seamlessly to help keep your home operating normally and your family safe, comfortable, and connected. From essential appliances to heating, cooling, and critical systems, a Generac standby generator provides confidence when storms, accidents, or utility failures strike. With proven performance and trusted technology, you gain real peace of mind knowing your home is prepared for the unexpected. We’ll guide you through the available options below to help you choose the right Generac system for your home and energy needs.

Generac air-cooled standby generators deliver dependable, automatic backup power when the grid goes down. They start within seconds of an outage to keep your home running and your family comfortable. We’ll help you choose the right Generac system from the options below.

10kW 14kW 18kW 22kW 24kW 26kW 28kW

10kW

10kW Generac Generator

The Generac Next Generation 10kW Generator offers reliable backup power with 10,000 watts on propane and 9,000 on natural gas. It features a durable engine, clean power for devices, quiet self-tests, and a weather-resistant design. It can be installed with an essential circuit transfer switch supporting 10–12 circuits or a whole-house transfer switch capable of powering a 1,500-square-foot home. 4G Remote monitoring makes it easy to stay connected.

Specifications for the 10kW Generac Generator

- - Rated kW LPG/NG: 10/9
  - Main Line Circuit Breaker: 45 amp
  - Amps @ 240V LPG: 41.7
  - Amps @ 240V NG: 37.5
  - Operating RPM: 3600
  - Engine: Generac G-Force 400 Series
  - Engine Displacement: 459cc
  - Fuel Consumption @ Full Load – NG cu. ft/hr: 127
  - Fuel Consumption @ Full Load – LPG cu. ft/hr (gal/hr): 54 (1.48)
  - db(A) at Normal Operating Load: 61
  - Dimensions (L x W x H) in: 46.4 x 26.3 x 30.7
  - Weight (lb): 334

14kW

14kW Generac Generator

The Generac 7258 (14kW) standby generator keeps your home running automatically during outages, whether you use natural gas or propane. It delivers clean, stable power that’s safe for sensitive electronics, and it runs a quick weekly self-test so you know it’s ready when you need it. Built with Generac’s tough G-Force engine and an all-weather enclosure, it’s made for long-term reliability outdoors. With Mobile Link™ monitoring (Wi-Fi/Bluetooth and cellular options), you can check generator status and alerts right from your phone—anytime, anywhere. Pair it with the right automatic transfer switch to back up a few essential circuits or cover more of the home.

Specifications for the 14kW Generac Generator

- - Rated kW LPG/NG: 14/14
  - Main Line Circuit Breaker: 60 amp
  - Amps @ 240V LPG: 58
  - Amps @ 240V NG: 58
  - Operating RPM: 3600
  - Engine: Generac G-Force 800 Series
  - Engine Displacement: 817cc
  - Fuel Consumption @ Full Load – NG cu. ft/hr: 243
  - Fuel Consumption @ Full Load – LPG cu. ft/hr (gal/hr): 106 (2.92)
  - db(A) at Normal Operating Load: 65
  - Dimensions (L x W x H) in: 46.4 x 26.3 x 30.7
  - Weight (lb): 391

18kW

18kW Generac Generator

The Generac 7259 (18kW) standby generator is a strong choice for homeowners who want true whole-home protection—and it’s commonly recommended for homes around 1,500–2,500 sq ft (depending on what you want to run during an outage). It runs on natural gas or propane, starts automatically when the power goes out, and provides clean, stable power that’s safe for today’s sensitive electronics. It also keeps itself ready with automatic weekly self-tests. One of the best parts is the built-in connectivity: with cellular + Wi-Fi + Bluetooth and Mobile Link™, you can check generator status and get alerts right from your phone, whether you’re home or away.

Specifications for the 18kW Generac Generator

- - Rated kW LPG/NG: 18/17
  - Main Line Circuit Breaker: 80 amp
  - Amps @ 240V LPG: 75
  - Amps @ 240V NG: 71
  - Operating RPM: 3600
  - Engine: Generac G-Force 800 Series
  - Engine Displacement: 817cc
  - Fuel Consumption @ Full Load – NG cu. ft/hr: 235
  - Fuel Consumption @ Full Load – LPG cu. ft/hr (gal/hr): 105 (2.87)
  - db(A) at Normal Operating Load: 65
  - Dimensions (L x W x H) in: 46.4 x 26.3 x 30.7
  - Weight (lb): 426

22kW

22kW Generac Generator

The Generac 7260 (22kW) standby generator is an excellent option for homeowners who want serious whole-home backup power, especially for larger homes or households with heavier electrical demands (multiple refrigerators, well pumps, sump pumps, electric cooking, larger HVAC loads, etc.). It runs on natural gas or propane, turns on automatically when the utility power drops, and delivers clean, steady power that’s safe for modern electronics.

Specifications for the 22kW Generac Generator

- - Rated kW LPG/NG: 22/21
  - Main Line Circuit Breaker: 100 amp
  - Amps @ 240V LPG: 92
  - Amps @ 240V NG: 88
  - Operating RPM: 3600
  - Engine: Generac G-Force 1000 Series
  - Engine Displacement: 997cc
  - Fuel Consumption @ Full Load – NG cu. ft/hr: 311
  - Fuel Consumption @ Full Load – LPG cu. ft/hr (gal/hr): 135 (3.71)
  - db(A) at Normal Operating Load: 67
  - Dimensions (L x W x H) in: 46.4 x 26.3 x 30.7
  - Weight (lb): 451

24kW

24kW Generac Generator

The Generac 7261 (24kW) air-cooled standby generator provides fast, dependable automatic backup power during outages. It’s a strong choice for whole-home protection and is commonly recommended for 3,000–4,000 sq ft homes (depending on which loads you want to run, like HVAC and pumps). It delivers up to 24kW on propane (LP) and 22.5kW on natural gas (NG), connecting to your existing fuel supply for extended outage support. It starts within seconds of a power loss and runs until utility power returns. With built-in cellular Mobile Link, you can monitor status and receive alerts on your phone.

Specifications for the 24kW Generac Generator

- - Rated kW LPG/NG: 24/22.5
  - Main Line Circuit Breaker: 100 amp
  - Amps @ 240V LPG: 100
  - Amps @ 240V NG: 94
  - Operating RPM: 3600
  - Engine: Generac G-Force 1000 Series
  - Engine Displacement: 997cc
  - Fuel Consumption @ Full Load – NG cu. ft/hr: 291
  - Fuel Consumption @ Full Load – LPG cu. ft/hr (gal/hr): 135 (3.71)
  - db(A) at Normal Operating Load: 67
  - Dimensions (L x W x H) in: 46.4 x 26.3 x 30.7
  - Weight (lb): 461

26kW

26kW Generac Generator

The Generac 7327 (26kW) air-cooled standby generator is built for homeowners who want strong whole-home backup power—especially in larger houses or homes with heavier electrical demand. It’s commonly recommended for ~3,500–4,500 sq ft homes (depending on what you plan to run during an outage, like multiple A/C units, well pumps, sump pumps, and other big loads). It delivers up to 26kW on propane (LP) and 24kW on natural gas (NG), connecting to your existing fuel supply for extended outage coverage. When the utility goes out, it starts automatically, restores power quickly, and runs until the grid returns.

Specifications for the 26kW Generac Generator

- - Rated kW LPG/NG: 26/24
  - Main Line Circuit Breaker: 110 amp
  - Amps @ 240V LPG: 108
  - Amps @ 240V NG: 100
  - Operating RPM: 3600
  - Engine: Generac G-Force 1000 Series
  - Engine Displacement: 997cc
  - Fuel Consumption @ Full Load – NG cu. ft/hr: 316
  - Fuel Consumption @ Full Load – LPG cu. ft/hr (gal/hr): 144 (3.95)
  - db(A) at Normal Operating Load: 67
  - Dimensions (L x W x H) in: 46.4 x 26.3 x 30.7
  - Weight (lb): 524

28kW

28kW Generac Generator

The Generac 7282 (28kW) air-cooled standby generator is Generac’s most powerful air-cooled home standby option—ideal for homeowners who want maximum whole-home backup power. It’s commonly chosen (and often recommended) for larger homes around 4,500+ sq ft, or for households with heavy electrical demand like multiple HVAC systems, well pumps, sump pumps, and other high-draw appliances. It delivers up to 28kW on propane (LP) and 25kW on natural gas (NG), connects to your existing fuel supply for extended outage support, and starts automatically when the power goes out—then runs until utility power is restored.

Specifications for the 28kW Generac Generator

- - Rated kW LPG/NG: 28/25
  - Main Line Circuit Breaker: 125 amp
  - Amps @ 240V LPG: 116
  - Amps @ 240V NG: 104
  - Operating RPM: 3600
  - Engine: Generac G-Force 1000 Series
  - Engine Displacement: 997cc
  - Fuel Consumption @ Full Load – NG cu. ft/hr: 297
  - Fuel Consumption @ Full Load – LPG cu. ft/hr (gal/hr): 144 (3.97)
  - db(A) at Normal Operating Load: 67
  - Dimensions (L x W x H) in: 46.4 x 26.3 x 30.7
  - Weight (lb): 524

Your Complete Guide to Installing and Maintaining a Generac Generator in New Jersey

Achieve energy independence with our full-service Generac generator solutions. We offer more than just installation—our services include personalized financing options, expert system design, seamless installation, and ongoing local support. At Green Sun Energy Services, LLC, we’re committed to helping New Jersey homeowners stay protected from unexpected power outages, ensuring reliable, 24/7 backup power for your home.

Products & Solutions

Looking for dependable generator solutions? Green Sun Energy Services offers a full range of services, including sales, installation, maintenance, and repairs. Whether you need backup power for your home or business, our expert team and partnership with Generac ensure reliable power and protection from outages. Don’t compromise on safety—trust us for uninterrupted energy.

Learn More

Consult to Installation

Installing a new standby generator may seem overwhelming, but we make it simple by managing every detail. From start to finish, your Project Manager ensures smooth coordination and keeps you updated on progress, making the entire process hassle-free.

Learn More

Generac Generator Maintenance

Annual maintenance is essential for safe, reliable operation of your Generac generator. Regular maintenance with genuine Generac parts ensures optimal performance when you need it most. Our services include oil and filter changes, spark plug checks and adjustments, and full system testing to ensure your generator works flawlessly.

Learn More

Frequently Asked Questions

Find answers to common questions about Generac generators, including their purpose, benefits, fuel options, installation process, maintenance needs, noise levels, and lifespan. Our FAQs provide valuable insights to help you make informed decisions on choosing and maintaining a generator that meets your needs.

Learn More

Talk to a New Jersey-Based Generator Expert Today!

Got questions about installing or maintaining a Generac generator? Our highly trained team is here to provide expert answers—whether it’s a quick question or a detailed discussion. Let’s find the perfect solution for you!

Let's Get Started

See What Our Clients Have to Say

GusFarmingdale, NJ · 2026
Reviewed us onGoogle
Excellent service, follow-up, and an outstanding experience throughout the entire process! We were extremely happy with Green Sun…
Read more
…Energy Services from the first day through the final Township approvals. They even coordinated with the gas company to install a larger gas meter for our new generator. A special thank-you to Jennifer for her consistent follow-up and help getting everything completed. We highly recommend the team! Gus & Joan Vergara
See the project
Holmdel, NJ · 2026
Reviewed us onGoogle
John and Auston were a stellar team, their attention to detail was amazing. Thank you!
See the project
JeannieMorganville, NJ · 2026
Reviewed us onGoogle
We purchased a generator last October and it was installed by Green Sun Energy Services. There were a few delays beyond their…
Read more
…control (snow, town permits, technical problem with the actual generator), but I was so pleased with the professionalism of everyone I dealt with Glen, Karen, Jennifer, Chris and all the technicians who worked to install our generator. Early this morning I experienced our first extended loss of power due to a large tree falling in the area. After a few seconds in the dark and some supernatural sounds, our generator powered right up. Nine hours later power is still out but our generator is going strong. Definitely one of the best purchases we've made!
See the project
BarryLambertville, NJ · 2026
Reviewed us onGoogle
Austin visited for the yearly maintenance on our generator. He was courteous, pleasant, and professional. He explained everything…
Read more
…he did in detail. I appreciate that Green Sun keeps track of the maintenance schedule so I don't have to. Great service.
See the project
ThomasMiddletown, NJ · 2026
Reviewed us onGoogle
Mike serviced and installed a new battery for my generator.He did a great job and was very helpful with all my questions.Thank You.
See the project
Ronald and RobinFair Haven, NJ · 2026
Reviewed us onBBB
As an engineer, I appreciate and recognize what it takes to plan and execute an excellent job, and thats what Green Sun Energy…
Read more
…did for us with the installation, and now ongoing maintenance, of our stand-by generator.
See the project
AnnamariaRed Bank, NJ · 2026
Reviewed us onYelp
Our annual service was done yesterday by John he was amazing and has been serving our generator for a few years now, the whole team is amazing!
See the project
Steve and LisaScotch Plains, NJ · 2026
Reviewed us onYelp
Mike was great! Thorough and professional!! Took the time to explain what he did/replaced.
See the project
MarcinParlin, NJ · 2026
Reviewed us onGoogle
Great generator service and troubleshooting by Auston. Highly recommend the company.
See the project

Primary Generator Service Areas In New Jersey

Green Sun Energy Services delivers professional whole-home standby generator installation, maintenance, and repair across Monmouth, Ocean, Middlesex, Somerset, Mercer, and Union counties. As a certified Generac installer, we help homeowners safeguard their property with reliable backup power solutions designed for New Jersey’s demanding weather and frequent outages. Our expert team ensures every generator system is sized correctly, installed to code, and maintained for long-term performance. Explore our primary service areas below to see how we keep homes powered and protected.

Ocean County

Show all 42 Ocean towns

Harvey Cedars
Island Heights
Lacey Township
Lakehurst
Lanoka Harbor
Mystic Island
Ocean Gate
Ocean Township
Pine Beach
Plumsted Township
Ship Bottom
Stafford Township

Middlesex County

Show all 54 Middlesex towns

Edgebrook
Ernston
Gillespie
Heathcote
Highland Park
Jamesburg
Lincoln Park
Madison Park
Melrose
Middlesex
Milltown
Morgan Heights
New Brunswick
Perth Amboy
Port Reading
Princeton Meadows
Raritan Gardens
Rossmoor
Sayre Woods
Sewaren
Society Hill
South Amboy
South River
Westons Mills

Somerset County

- Basking Ridge
Belle Mead
Bernardsville
Blackwells Mills
Blawenburg
Bound Brook
Bradley Gardens
Branchburg
Bridgewater
Clyde
East Millstone
Far Hills
Finderne
Franklin Township
Gladstone
Green Brook
Green Knoll
Griggstown
Harlingen
Hillsborough
Kingston
Manville
Martinsville
Middlebush
Millstone Borough
Mine Brook
Skillman
Somerset
Somerville
Warren

Show all 41 Somerset towns

North Plainfield
Peapack
Pleasant Plains
Raritan
Rocky Hill
South Bound Brook
Ten Mile Run
Voorhees
Watchung
Weston
Zarephath

Mercer County

- East Windsor
Ewing
Groveville
Hamilton
Hamilton Square
Hightstown
Hillcrest
Hopewell
Lawrence Township
Lawrenceville
Mercerville
Pennington
Princeton
Princeton Junction
Robbinsville
Trenton
Twin Rivers
White Horse
Yardville

Get the Best Generac Generator Installation & Maintenance in New Jersey

Protect Your Home 24/7 with a New Generac Generator

Say Goodbye to Power Outages With a Generac Generator

Locally owned and operated

Focused on long-term relationships

Flexible payment solutions

Industry-leading products, workmanship, and warranty

Get Your Hassle-Free Generator Estimate

How can we reach you?

We Protect Your Information

Customer Reviews for Solar, Roofing, EV Chargers, Generators, Soft Washing & Holiday Lighting

Get the Unbeatable Protection of a Generac Generator!

Choose the Right Level of Backup Power

We Handle Everything

Why Choose a Generac Standby Generator

Generac Generator Orientation

Generac Standby Generators for Reliable Home Backup Power

10kW Generac Generator

Specifications for the 10kW Generac Generator

Your Complete Guide to Installing and Maintaining a Generac Generator in New Jersey

Products & Solutions

Consult to Installation

Generac Generator Maintenance

Frequently Asked Questions

Talk to a New Jersey-Based Generator Expert Today!

See What Our Clients Have to Say

Primary Generator Service Areas In New Jersey

Monmouth County

Ocean County

Middlesex County

Somerset County

Mercer County

Union County

Other Areas Serviced

Service Areas

Headquartered in Middletown, NJ

Company

Services

Credentials